Install atmel FLIP software located at http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3886, then when you plug your avrkey in and it asks to install drivers, point it to X:\Program Files\Atmel\Flip 3.4.2\usb (if you’ve already programmed your avrkey before, then you will need to get it into programming mode by plugging and unplugging it approx 4 times until the light is blue).

Then open up the FLIP software, select atmega32u2 as your usb board. Then flash your AVRKey with any legal hex file. As a side note the AVRKey will work with any hex code setup for the original Teensy 1.0

Install atmel FLIP software located at http://www.atmel.com/dyn/products/to...p?tool_id=3886, then when you plug your avrkey in and it asks to install drivers, point it to X:\Program Files\Atmel\Flip 3.4.2\usb (if you’ve already programmed your avrkey before, then you will need to get it into programming mode by plugging and unplugging it approx 4 times until the light is blue).

Then open up the FLIP software, select atmega32u2 as your usb board. Then flash your AVRKey with any legal hex file. As a side note the AVRKey will work with any hex code setup for the original Teensy 1.0